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Author Topic: Help with my meyer lemon  (Read 1563 times)

Mtlgirl

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Help with my meyer lemon
« on: September 02, 2017, 09:45:14 AM »
Hi everyone,
some leaves on my meyer lemon have develop some yellow patches on the. What do you think could be the reason?
Here are some background:
- I live in montreal canada where we had a very wet and cold summer this year.
- I only water my tree when the top is drying and give some fertilizer once a week (dynagro foliage 9-3-6).
- It had been outdoor all summer and Have been indoor this week because the temperature is going down to 40F.
Where are some pictures



I have inspected the tree and didn t see any bugs. By precaution, I spray my tree with a insecticide soap.
Thank you for your hep

Susanne42

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Re: Help with my meyer lemon
« Reply #1 on: September 02, 2017, 12:53:43 PM »
looks like a fungus? With all the rain I think very possible

matt_citrus

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Re: Help with my meyer lemon
« Reply #2 on: September 02, 2017, 09:15:31 PM »
People have seemed to think this is a form of greasy spot fungus.

Millet

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Re: Help with my meyer lemon
« Reply #3 on: September 02, 2017, 09:45:01 PM »
It certainly does not look like greasy spot

matt_citrus

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Re: Help with my meyer lemon
« Reply #4 on: September 02, 2017, 10:06:30 PM »
I didn't say I agreed ;). But would love a better diagnosis!

Millet

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Re: Help with my meyer lemon
« Reply #5 on: September 03, 2017, 12:16:47 PM »
The symptoms of Mtlgirl's tree look simular to Matt-citrus' tree.

Mtlgirl

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Re: Help with my meyer lemon
« Reply #6 on: September 03, 2017, 01:25:57 PM »
Hi,
I already tried to spray my tree with a fungicide a few weeks ago. Should I spray it another time?
Thank you for all your help

Millet

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Re: Help with my meyer lemon
« Reply #7 on: October 29, 2017, 05:44:33 PM »
Mat, MtGirl said she sprayed her tree with EndAll  which is a Pyrethtrum/soap compound, and it stopped her tree's problem.  See her post, her leaves look almost exactly like yours.

matt_citrus

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Re: Help with my meyer lemon
« Reply #8 on: October 30, 2017, 02:23:57 AM »
Millet, thanks. I did catch that in the other thread. Looks like it has Neem extract too. Heavy duty combo with the pyreth. and soaps - probably takes out the beneficials too. I wonder what it's defeating for the improvement?

Mtlgirl

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Re: Help with my meyer lemon
« Reply #9 on: October 30, 2017, 08:47:30 PM »
Hi Matt, what are the symptoms on your tree? Do you have old leaves falling?

Mark in Texas

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Re: Help with my meyer lemon
« Reply #10 on: October 31, 2017, 08:21:56 AM »
I have inspected the tree and didn t see any bugs. By precaution, I spray my tree with a insecticide soap.
Thank you for your hep


Just some wild guesses here.  I'm afraid of those soaps which are fatty acids of a salt.  I've burned foliage with them and that may be what's going on with yours.  Could be a fungus too, hard to tell.   My go to broad spectrum systemic fungicide is copper sulfate pentahydrate.  MagnaBon CS2005 or the more expensive one Phyton35.

I drenched my citrus with Bonide All Seasons Horticultural Soap yesterday and you would know it - temps in the greenhouse got up to 95F!  Hope there's no damage.  Here's a recent thread on it.  http://tropicalfruitforum.com/index.php?topic=25819.0

matt_citrus

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Re: Help with my meyer lemon
« Reply #11 on: November 01, 2017, 01:09:50 AM »
Hi Matt, what are the symptoms on your tree? Do you have old leaves falling?

Mtlgirl, see images here with similar symptoms:
 http://tropicalfruitforum.com/index.php?topic=25226.0

Mtlgirl

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Re: Help with my meyer lemon
« Reply #12 on: November 02, 2017, 07:43:44 PM »
Hi Matt, did you see any improvement with liquid cop or horticulture oil?
Thanks

snek

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Re: Help with my meyer lemon
« Reply #13 on: January 09, 2018, 05:06:32 PM »
I still think it's some kind of fungus.
Here's the photo in high resolution










« Last Edit: January 09, 2018, 05:26:17 PM by snek »

matt_citrus

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Re: Help with my meyer lemon
« Reply #14 on: January 10, 2018, 01:19:19 AM »
Snek, the symptoms you describe here and in the other thread match my experience so far. Only affecting the Meyer lemon (and mine is in the ground on standard rootstock) and not spreading to any adjacent trees.

I did recently find a contact in the CDFA Plant Pathology office that offered to diagnose, so I'll probably send a cutting in soon and perhaps we can all resolve!

snek

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Re: Help with my meyer lemon
« Reply #15 on: January 10, 2018, 03:23:13 AM »
Yes - affecting only the Meyer lemon. The rootstock or size of the plant has no effect on it. I have more plants, more combinations.

Good news!! Thanks. I will look forward to the outcome and the information.

domer

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Re: Help with my meyer lemon
« Reply #16 on: January 21, 2018, 02:57:21 PM »
New to the forum and learning a bunch from reading past posts.

I am having a (related) issue on my Meyer lemon tree that has been like this for a few months now.  Any advice on how best to address this would be greatly appreciated.  Many thanks in advance.






 

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